位置权限的 iOS alertview 不会弹出答案

【问题标题】：iOS alertview for location permission doesn't pop up位置权限的 iOS alertview 不会弹出
【发布时间】：2014-09-18 10:34:05
【问题描述】：

我刚开始我的 iOS 8 项目，我也遇到了我无法弹出问题以获得许可的问题。我在 info.plist 中添加了以下内容

<key>NSLocationWhenInUseUsageDescription</key>
<string>The spirit of stack overflow is coders helping coders</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>I have learned more on stack overflow than anything else</string>

这是我的代码：

@interface ViewController () <MKMapViewDelegate>
@property (nonatomic, strong) UIPopoverController* userDataPopover;
@property (weak, nonatomic) IBOutlet MKMapView *mapView;
@property (strong, nonatomic, retain) CLLocationManager *locationManager;
@end

@implementation ViewController

-(CLLocationManager *)locationManager
{
    if(!_locationManager) _locationManager = [[CLLocationManager alloc]init];
    return _locationManager;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.mapView.delegate = self;
        [self.locationManager requestWhenInUseAuthorization];
        //[self.locationManager requestAlwaysAuthorization];

    [self.locationManager startUpdatingLocation];

    self.mapView.showsUserLocation = YES;
    [self.mapView showsUserLocation];
    [self.mapView setMapType:MKMapTypeStandard];
    [self.mapView setZoomEnabled:YES];
    [self.mapView setScrollEnabled:YES];
}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES];
}

【问题讨论】：

iOS8 中的整个位置都破坏了我的应用程序。在 iOS7 中工作正常，现在有了权限更改，一切都被打破了。将密切关注这一点。
我在我的代码中找到了解决方案。当我忽略这一行时：[self.locationManager startUpdatingLocation];一切都开始工作了！希望对你有帮助！
为您的 plist 中的精彩文字点赞！

标签： ios ios8 xcode6

【解决方案1】：

确保您的视图控制器实现 CLLocationManagerDelegate 并导入 #import CoreLocation/CoreLocation.h

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self setLocationManager:[[CLLocationManager alloc] init]];

    if([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]){
        [self.mapview setShowsUserLocation:NO];
        [self.locationManager setDelegate:self];
        [self.locationManager requestWhenInUseAuthorization];
    }
    else{
        //Before iOS 8
        [self.mapview setShowsUserLocation:YES];
    }
}

添加这个方法来监听 AuthorizationStatus 的变化

-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
   if (status == kCLAuthorizationStatusDenied) {
       // permission denied
       [self.mapview setShowsUserLocation:NO];
   }
   else if (status == kCLAuthorizationStatusAuthorized) {
       // permission granted
       [self.mapview setShowsUserLocation:YES];
   }
}

最后确保您的 plist 包含 Sanne 指出的以下条目

<key>NSLocationWhenInUseUsageDescription</key>
<string>The spirit of stack overflow is coders helping coders</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>I have learned more on stack overflow than anything else</string>

【讨论】：

【解决方案2】：

iOS 10 的新功能现在在 plist 文件中添加位置权限

如果不在 plist 中添加权限，则权限弹出窗口不显示

在 plist 中添加以下权限

1.隐私-使用时的位置使用说明

2.Privacy - Location Always 使用说明

【讨论】：